For small appliances such as washing machines and water purifiers, there are various options for water level measurement, such as float, reed switch, ultrasonic reflection, resistance or capacitance, itd. All of them require the placement of corresponding devices in the water tank, which is limited by size and structure, and most of them are not highly accurate. As the demand for more efficient washing machines grows, more and more products are using MEMS-based pressure sensors to detect the water level. The main purpose of these sensors is to monitor and control the water level inside the washing machine to ensure that the washing process runs smoothly, and they are extremely accurate and can reliably make such measurements in water. MEMS sensors detect millimetre changes in water level, helping to optimise the efficiency of the washing machine.
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Washing Machine Water Level Sensor Working Principle
1. There is an air chamber in the outer drum of the washing machine, when the water level changes, it changes the pressure inside the air chamber, which is connected to the water level sensor through a plastic pipe.
2. The structure of the water level sensor is that there is a magnetic ring inside, a coil forming an LC circuit, a diaphragm, when the air pressure rises, it will be blown up, driving the coil to move upwards in the magnetic ring, thus changing the value of the inductance. This value is transmitted to the computer board of the washing machine. The computer board determines whether the preset water level has been reached according to the size of the value, in order to issue commands to control the on-off of the water valves to control the amount of incoming water.
Principle of water level sensor
1. The water level sensor inside the container sends the sensed water level signal to the controller, and the computer in the controller compares the actual water level signal with the set signal to get the deviation, and then according to the nature of the deviation, it sends out the on and off commands to the electric valve of the water supply to make sure that the container reaches the set water level.
2. After the water inlet procedure is completed, the computer in the temperature control section sends an open command to the electric valve supplying the heat medium, so the system starts to heat the water in the container.
3. When the set temperature is reached, the controller will issue a command to close the valve. Only when the controller sends the command to close the valve, cut off the heat source, and the system enters the keep warm state. In the process of programming to ensure that the system does not reach a safe water level, the control of the heat source of the electric regulator valve does not open the valve, thus avoiding the loss of heat and the occurrence of accidents.
4. Application of water level sensor: widely used in water plants, refineries, chemical plants, glass factories, sewage treatment plants, high-rise water supply systems, reservoirs, rivers, oceans, itd. for water supply pools, water distribution pools, water treatment pools, water wells, tanks, water tanks, oil wells, tanks, oil tanks, and static and dynamic liquid level measurement and control of various liquids.
Automatic washing machine water level sensor principle
1. Sensor inside the active coil and magnetic poles, diaphragm, intelligent fuzzy control of the fully automatic washing machine can also be, the most common is the sensor with a plastic tube connected to the bottom of the washing drum, the washing machine water level sensor, for the water level sensor of the fully automatic washing machine.
2. The top of the tube is a pressure sensor, a washing machine water level when the washing machine into the water, a washing machine outside the drum there is an air chamber, Haier fully automatic washing machine water level sensor failure.
3. Unplug the transparent tube at the bottom end of the water level sensor blowing, there is a plastic tube inside the washing machine, when the washing machine into the water, the washing machine pressure sensor is actually the water level pressure switch, spinning using piezoelectric sensors.
4. The size of the water level pressure is based on the amount of water in the washing drum in the slender hose produced by the pressure, automatic washing machine water level detection is based on the size of the air pressure in the water pressure hose connected to the inner side of the washing drum to judge, resulting in the water level sensor feedback output error leads to no water or more than the water inlet to control the washing machine for washing, the water switch is a wheel-type automatic washing machine to control the amount of water in the wash bucket The water level switch is the electrical component that controls the amount of water in the washing drum of a wheel type fully automatic washing machine.
5. Automatic washing machine water level sensor working principle, washing machine water level sensor is the sensor does not reset the sensor, the water level sensor is a LC circuit, the answer is suitable for most of the wash, if you suspect that the water level sensor malfunction.
6. This air chamber is connected to the water level sensor through a plastic tube, can be replaced with a new washing machine water level sensor, fully automatic washing machine is through the water level switch and electromagnetic water inlet valve with the control of water inlet, drain and motor on and off, washing machine water level sensor failure repair and inspection methods, fully automatic washing machine water level switch.
Where is the washing machine water level sensor, the location of the washing machine water level sensor
1, usually in the upper left corner of the washing machine. For drum washing machine, we just need to open the top cover of the washing machine, and then along the water inlet pipe, see the water inlet valve, there is an accessory around it is connected with the air pipe, this is the water level sensor; for the wave washing machine, you need to remove the control panel, and then according to the above method will be able to find the sensor.
2, because the washing machine is electrified home appliances, in order to ensure its good performance, in the installation of the washing machine, do not put it in a humid environment, so as to avoid water vapour into the interior of the washing machine, so that its motor, parts of moisture, rust and other problems. In addition, we also need to put it in a ventilated place, so as to prolong its service life.
When the programme of the washing machine is set, the washing machine will automatically start to feed water, when the water level sensor of the washing machine senses that the water level in the inner drum has reached the required height, the washing machine will start to wash automatically, so where is the water level sensor of the washing machine? The following with WF editorial together to see it.
Where is the water level sensor of the washing machine?
1. If it is a drum washing machine, then the water level sensor is usually located near the water inlet valve of the washing machine, we just need to open the top cover of the washing machine, and look along the water inlet pipe, and you can usually find the water level sensor near the water inlet valve of the washing machine.
2. If the washer is a wave washer, the water level sensor is usually installed on the control panel, that is, below the knob that can adjust the water level, we just need to remove the control panel of the washer, you can usually find the water level sensor.
3. The air nozzle of the water level sensor of the washing machine is usually connected with the pressure hose, and the other end of the pressure hose is usually connected with the air chamber opening under the outer drum of the washing machine, and the air chamber opening is connected with the bottom of the outer drum of the washing machine.
4. When there is no water in the inner drum of the washer, and the air hose is not twisted or clogged, once the washer fails to fill with water or keeps on filling with water, then it is usually because the water level sensor of the washer has a problem.
Faults that can be triggered by the water level sensor of the washing machine:
1. Water can enter
The water level sensor of the washing machine is broken, it can enter water, but cannot spin. Because of the water level monitoring failure, it can not be drained, resulting in not being able to retreat.
2. Uncontrolled water filling
The washer water level sensor is broken, the water filling is not controlled, resulting in the water has been constantly filling.
3. The water level will be much different from the actual water level, and the actual height of the selected water level is not proportional. Water and electricity costs, washing machine water level sensor is broken will lead to the water level and the actual water level is much worse, water and electricity costs.
4. No spinning
A broken water level sensor will prevent the washer from spinning and washing clothes properly.
5. Laundry not clean
Bad water level sensor will lead to unclean washing, because the water level sensor can not sense the water level of the washing machine correctly, if the water level sensor is bad, the washing machine can not accurately judge the water level changes, resulting in the washing machine repeatedly adding water, or adding water to the washing machine after the washing machine can not wash the clothes, and ultimately lead to unclean washing.
Automatic washing machine water level sensor principle and maintenance
1. The water level sensor of the washing machine will be used for a long time after the aging situation, the main function of the washing machine water level switch is to set the height of the water level in the washing machine, there are movable coils, magnetic poles, diaphragms inside the sensor, when the washing machine control when the signal is received, the other end of the air pipe and the pressure sensor is connected, the water into the bucket. 2.
2. Find the sensor and remove, a washing machine water level sensor failure before the washing machine are used in three gears [high, fully automatic washing machine water level sensor is a pneumatic pressure sensor, conductive to the water level sensor.
3. Water level pressure switch and water level sensor is a completely different working principle, open the upper part of the washing machine shell, the container of the water level sensor, it and the working principle of the water level sensor is completely different, photoelectric level sensor words are high and low level output.
4. The water level sensor will not cause the water does not come out of the water, automatic washing machine water level sensor is the use of the principle of air pressure to promote the inside of the micro switch action and connected to the communication signal power supply so that the computer board inside the water inlet programme to control the water inlet solenoid valve, automatic washing machine water level sensor detection and repair methods, the water surface rises, the automatic washing machine water level sensor.
5. washing machine, two, small swan automatic washing machine water level sensor principle of dismantling the upper part of the washing machine shell, washing machine washing drum water pressure through a sealed plastic hose transfer, water level switch and water level sensor role is the same.
6. water temperature and water level sensor by the thermostat part of the water level control part of the composition of the automatic washing machine water level control switch is a use of mechanical pneumatic principle to control the contacts on and off the air pressure switch, water level detection is the water level sensor by the slender hose water level pressure to operate, resulting in the sensor in the inductive coil of the inductance of the greater the use of such a sensor in the use of the sensor on the water level of the induction of the error. The inductance of the coil in the sensor will increase, and the sensor will sense the water level incorrectly.
How to use the washing machine correctly?
1. Before using the washing machine, make sure you understand the instruction manual. When using the washing machine, always follow the instructions in the manual.
2. Before using the washer, always plug the washer into a wall outlet and make sure the grounding wire is connected.
3. Under normal circumstances, the water level of the washing machine should be controlled in the washing machine capacity of 3/4 position, so that not only can let the clothes clean, but also will not give the washing machine to bring the extra work pressure, and can also save water.
END
The above is a detailed description of where the water level sensor is located in the washing machine, hopefully it can help you find the specific location of the water level sensor in the washing machine. If you need to repair or replace the washer’s water level sensor, you need to know the basics of electrical safety, and if you really don’t know how to do it, then it’s best to get professional help.
